HELP!!!!!

I am in some desperate need of advice. I have recently applied for college. I am 24 and am married with an 18 month old. I previously attended college but it didn't fit with my goals. It was a big university and I came the the conclusion that I wanted a job instead of spending so many years in school.

I really want to get into the health profession but I am second guessing myself at every turn. I find a career that sounds great but then I keep thinking to myself "Am I smart enough for that?" or "Could I make those decisions?" I was a pretty good student in high school and I graduated with honors but my math skills have always held me back. When starting this whole process I wanted to be an ultra sound tech. But I saw that you need a strong foundation in math and I don't feel that I am up to that. Then there was Respiratory therapy. And my doubts with this career pretty much became my doubts for all the others I have considered. The question is always "Am I ready to make split second decisions when I need to?" and "Even if I am not ready now, is that something that the program teaches you and prepares you for?" I also think that surgical technology would be a good fit too but again, I am unsure. The only career that I have not had this feeling about is EKG technology. I can see myself easily being able to handle this but from all of my research, I have found that it doesn't earn the kind of salary that I want to earn and it is only a certificate, not a degree which is what I am looking for.

I guess what I really need / want to know is how hard it is to be a Respiratory Therapist and a Surgical Tech. Becuase my ONLY reservations are dealing with self confidence. And I am wondering if this is something that fades once you go through the program and are taught the skills for the job, or is it a situation where I HAVE to have the ability to make split decisions to even be right for the job? Also, how intense is the math specifially in these two careers?

I am sorry for making you read all of this, I just don't want to make a mistake like the first time I went to school. I want a career. But I want to make sure I am right for that career. Thank you in advance for all of your advice!